After a week-long journey across Greece and an overnight stay on the Acropolis hill, the flame that was lit in Ancient Olympia, birthplace of the Olympics, was carried into the Panathenaic Stadium by Korean Olympic speed skating medallist Kim Ki-hoon.
The crowd erupted into cheers as Greek skiing champion Ioannis Proios lit the golden cauldron surrounded by priestesses in long pleated robes.
"We are ready to welcome the world to PyeonChang," Games chief Lee Hee-beom said. "Pyeongchang 2018 will be Olympic Games of peace and harmony."
The Games take place from Feb. 9-25 in the mountainous resort town of Pyeongchang, 80 kilometres (50 miles) from the heavily fortified border with North Korea.
The run-up has been overshadowed by an escalating crisis triggered by North Korea's nuclear and ballistic missile tests, but organisers have said the Games will be safe.
South Korea staged the 1988 Summer Olympics and co-hosted the 2002 football World Cup with Japan and both events were marred by instances of aggression by North Korea.
Following Tuesday's handover in Athens, the flame is due to arrive in South Korea on Nov. 1 for a 2,018km relay before reaching Pyeongchang for the opening ceremony on Feb. 9.
Greece hosted the Summer Olympics in 2004.
(The story was refiled to remove a reference to Geneva in the third last paragraph)
(Reporting by Karolina Tagaris, editing by Ed Osmond)
